[#bsl-set-0d-insert-08]
= xref:bsl.adoc[bsl]::xref:bsl/set-0d.adoc[set]::insert
:relfileprefix: ../../
:mrdocs:

Move‐insert `value` if an equivalent key is not already present.

== Synopsis

Declared in `<bslstl_set.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/pair-0b.adoc[pair<set<KEY, COMPARATOR, ALLOCATOR>::iterator, bool>]
insert(xref:BloombergLP/bslmf/MovableRef.adoc[BloombergLP::bslmf::MovableRef<value_type>] value);
----

== Description

`value` is left in a valid but unspecified state. Return a pair whose `first` member is an iterator referring to the (possibly newly inserted) `value_type` object in this set that is equivalent to `value`, and whose `second` member is `true` if a new value was inserted, and `false` if the key was already present. This method requires that the (template parameter) type `KEY` be `move‐insertable` (see {Requirements on `KEY`}).

== Return Value

pair of iterator and whether a new element was inserted

== Parameters

[cols="1,4"]
|===
| Name| Description
| *value*
| key to move‐insert
|===


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